If your Mistress gave you a simple and discreet collar, that was not overly visible under a shirt for instance, would you be willing to wear it every day in public?
Bear in mind, that even though it is discreet, there is still a chance that people may suspect what it is.
Does it bother you that they may suspect?
What would you say if you were asked about your 'necklace'?
If the bond was strong and long enough I would definitely consider it.